World News Update, what you need to know

A young American living in Australia used the Google Translate service in an attempt to contact Arabic-speaking Islamic State recruiters, US prosecutors say.

ELSEWHERE:

BARI - At least 25 people have been killed and dozens are injured after two passenger trains collided head-on at high speed in southern Italy, sending debris flying into surrounding olive groves.

AMSTERDAM - An arbitration court has ruled China has no historic title over the waters of the South China Sea and breached the Philippines' sovereign rights with its actions, infuriating Beijing which dismissed the case as a farce.

BERLIN - A German court has convicted a man of committing a war crime after he posed for photos with severed heads in Syria.

LONDON - The UN AIDS agency has sounded the alarm saying a long-term decline in the number of new HIV infections in adults has stalled and action is needed to prevent a rebound in the global epidemic.

LONDON - British Prime Minister David Cameron has chaired a farewell Cabinet meeting as moving vans pulled up to his 10 Downing Street residence.